Manually-operated rotary dental tool.



O. G. SAMPHERE.

MANUALLY OPERATED ROTARY DENTAL TOOL.

APPLICATION FILED JULY 28, 1913.

Patented Apr. 28, 1914.

l vbbneooeo W/KM GRIN C. SAMPHERE,

PATENT OF MILWAUKEE,

WISCONSIN.

MANUALLY-OPEBATED ROTARY DENTAL TOOL.

Specification of Letters Patent.

Patented Apr, 28, 1914:.

Application filed July 28, 1913. Serial No. 781,454.

To (filer/10m it may concern:

Be it known that T, GRIN C. Sxrrrrrnnn, a

citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in lvIanually-Operated Rotary Dental Tools, of which the following is a specification.

The object of my invention is to provide a tool adapted to facilitate measuring teeth by wrapping a wire about the tooth and twisting up the ends until it fits snugly against the surface of the tooth and accurately measures the same.

My invention has in view the construction of a form of tool which can be manipulated by one hand to place the wire upon the tooth and twist it into measuring position. Also to provide a manually operated rotary dental tool, which can be conveniently used in the manipulation of a broach.

The drawing illustrates my invention, partly in longitudinal section, showing the wire in position with dotted lines indicating the position of the wire when its extremity is looped preparatory to adjustment to a tooth.

A. barrel 3:, is provided with a tubular extension B at one end and a set of clutch jaws C are mounted at the extremity of this extension, such jaws being adjusted to grip ping position by a collar D threaded upon the extension in a manner similar to the ordinary bit. The other end of the barrel A is provided with an auger shaped extension E having a swivel head 6 at its extremity by which it is connected with a thumb ring F. A sleeve G is mounted to slide upon the auger shaped shank E. This sleeve G is provided with ears H to which rings J are pivoted at J. The rings J are provided with projections L, which are adapted to enter the spiral groove 6 in the shank E. The barrel A is adapted to contain a coil of wire a. One end portion of this coil of wire passes through the tubular extension B and between the clutch jaws O. The extremity of the wire may be bent over and also inserted between the clutch aws C to form a loop as indicated by the dotted line M. In use, the extremity of the wire is bent over and engaged by the clutch jaws C, as indicated by the dotted line M. This loop of wire is then adjusted over the tooth. The thumb of the operator is inserted in the ring F and two fingers are inserted in the rings J By pushing with the fingers upon the rings J, the sleeve G will of course move toward the barrel. A and during this movement the rings will oscillate upon the pivot pms' J into contact with stops it. carried by the ears H. This causes the projection L to withdraw from the groove 6 so that the sleeve G may move freely in the direction of the barrel A. lVhen the sleeve G strikes the barrel A, it may be moved in the oppo site direction by pulling with the fingers upon the rings J. These rings will now oscillate in the direction of the ring Rand projections L will move inwardly and en gage in the groove 6, w iereupon the shank E, barrel A and extension B will be rotated, thus twisting the wire and causing the loop M to draw snugly around the tooth. The operation of moving the sleeve G back and forth may be repeated as many times as is necessary to draw the wire closely around the tooth, after which the wire may be removed from the tooth and the twisted loop cut away from the end of the wire, another length of which will then be drawn out and again formed into a loop when it is desired to measure another tooth.

It will be observed that the sleeve G with the pivoted rings J and projections L constitute a one way acting clutch for rotating the working parts of the tool in one direction only. This is an important feature of my invention, since it enables me to manipulate the tool with one hand. The tool may also be used for holding a broach for operation in root canals, said broach being clamped between the gripping jaws C in the same manner that the wire is clamped, as shown in the drawings.

I claim- 1. The combination with a wire holding barrel and clutch jaws connected therewith, of a shank connected with the barrel and provided with a helical groove, a clutch member adapted to be reciprocated along said shank and having actuating projections adapted to enter the groove therein, and a thumb ring having swivel connection with said shank, said clutch being provided with finger receiving members.

2. The combination with a support, of a set of gripping jaws adapted to engage a piece of wire between them, a thumb ring having swivel connection with said support, a sliding member mounted upon said sup port, finger rings pivotally connected with ggg ee ew said siiding member, and. devices connected finger receiving members for actuating the 10 with said finger rings and adapted to engage same. and rotate said support when the rings are In testimony whereof I aflix my signature moved in one direction. in the presence of two witnesses.

5 "ihe comb nation with a w1re sup port- ORIN O. SAMPI'KERE.

121;; and gripping device provided wlth an anger shaped shank, of a ring having swivel 1 (connection with said shank, and a one way acting shank-rotating clutch provided with t Witnesses LEvERE'r'r C. XVI-minim, IRMA D. BREMER.

Copies oi this patent may be obtained for five cents each, by addressing the Commissioner oi Eatents. Washington, D. G. 

